光输入 meaning in English

optical input

For single - mode laser system , the output of the receiver laser is not synchronized to its input ( message + message carrier ) , but to the message carrier . so the message can be decoded by the difference between the input and output of the receiver laser . in this case , the receiver laser serves as a message filter
在单模激光的混沌同步通讯中，接收器激光的强度输出和信号的载体同步而不和接收器激光的光输入(即信号+载体)同步，这样在信号接收端就可以利用接收器激光的强度输入和输出的差值来进行解码，这时接收器激光的作用就类似于一个信号过滤器。